Added classifiers for specific Python versions and a README badge.

README.rst

 pydocstyle - docstring style checker
 ====================================
+
+.. image:: https://travis-ci.org/PyCQA/pydocstyle.svg?branch=master
+    :target: https://travis-ci.org/PyCQA/pydocstyle
+
+.. image:: https://ci.appveyor.com/api/projects/status/40kkc366bmrrttca/branch/master?svg=true
+    :target: https://ci.appveyor.com/project/Nurdok/pydocstyle/branch/master
+
+.. image:: https://readthedocs.org/projects/pydocstyle/badge/?version=latest
+    :target: https://readthedocs.org/projects/pydocstyle/?badge=latest
+    :alt: Documentation Status
+
+.. image:: https://img.shields.io/pypi/pyversions/pydocstyle.svg
+    :target: https://pypi.org/project/pydocstyle
+
+
 (formerly pep257)
 **pydocstyle** is a static analysis tool for checking compliance with Python
@@ -41,16 +56,6 @@ Run
 Links
 -----
-.. image:: https://travis-ci.org/PyCQA/pydocstyle.svg?branch=master
-    :target: https://travis-ci.org/PyCQA/pydocstyle
-
-.. image:: https://ci.appveyor.com/api/projects/status/40kkc366bmrrttca/branch/master?svg=true
-    :target: https://ci.appveyor.com/project/Nurdok/pydocstyle/branch/master
-    
-.. image:: https://readthedocs.org/projects/pydocstyle/badge/?version=latest
-    :target: https://readthedocs.org/projects/pydocstyle/?badge=latest
-    :alt: Documentation Status
-
 * `Read the full documentation here <http://pydocstyle.org>`_.
 * `Fork pydocstyle on GitHub <http://github.com/PyCQA/pydocstyle>`_.

setup.py

@@ -29,8 +29,14 @@ setup(
     classifiers=[
         'Intended Audience :: Developers',
         'Environment :: Console',
+        'Development Status :: 5 - Production/Stable',
         'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Operating System :: OS Independent',
         'License :: OSI Approved :: MIT License',
     ],